--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/smarty/internals/core.load_plugins.php	Sun Mar 23 14:59:33 2008 -0400
@@ -0,0 +1,125 @@
+<?php
+/**
+ * Smarty plugin
+ * @package Smarty
+ * @subpackage plugins
+ */
+
+/**
+ * Load requested plugins
+ *
+ * @param array $plugins
+ */
+
+// $plugins
+
+function smarty_core_load_plugins($params, &$smarty)
+{
+
+    foreach ($params['plugins'] as $_plugin_info) {
+        list($_type, $_name, $_tpl_file, $_tpl_line, $_delayed_loading) = $_plugin_info;
+        $_plugin = &$smarty->_plugins[$_type][$_name];
+
+        /*
+         * We do not load plugin more than once for each instance of Smarty.
+         * The following code checks for that. The plugin can also be
+         * registered dynamically at runtime, in which case template file
+         * and line number will be unknown, so we fill them in.
+         *
+         * The final element of the info array is a flag that indicates
+         * whether the dynamically registered plugin function has been
+         * checked for existence yet or not.
+         */
+        if (isset($_plugin)) {
+            if (empty($_plugin[3])) {
+                if (!is_callable($_plugin[0])) {
+                    $smarty->_trigger_fatal_error("[plugin] $_type '$_name' is not implemented", $_tpl_file, $_tpl_line, __FILE__, __LINE__);
+                } else {
+                    $_plugin[1] = $_tpl_file;
+                    $_plugin[2] = $_tpl_line;
+                    $_plugin[3] = true;
+                    if (!isset($_plugin[4])) $_plugin[4] = true; /* cacheable */
+                }
+            }
+            continue;
+        } else if ($_type == 'insert') {
+            /*
+             * For backwards compatibility, we check for insert functions in
+             * the symbol table before trying to load them as a plugin.
+             */
+            $_plugin_func = 'insert_' . $_name;
+            if (function_exists($_plugin_func)) {
+                $_plugin = array($_plugin_func, $_tpl_file, $_tpl_line, true, false);
+                continue;
+            }
+        }
+
+        $_plugin_file = $smarty->_get_plugin_filepath($_type, $_name);
+
+        if (! $_found = ($_plugin_file != false)) {
+            $_message = "could not load plugin file '$_type.$_name.php'\n";
+        }
+
+        /*
+         * If plugin file is found, it -must- provide the properly named
+         * plugin function. In case it doesn't, simply output the error and
+         * do not fall back on any other method.
+         */
+        if ($_found) {
+            include_once $_plugin_file;
+
+            $_plugin_func = 'smarty_' . $_type . '_' . $_name;
+            if (!function_exists($_plugin_func)) {
+                $smarty->_trigger_fatal_error("[plugin] function $_plugin_func() not found in $_plugin_file", $_tpl_file, $_tpl_line, __FILE__, __LINE__);
+                continue;
+            }
+        }
+        /*
+         * In case of insert plugins, their code may be loaded later via
+         * 'script' attribute.
+         */
+        else if ($_type == 'insert' && $_delayed_loading) {
+            $_plugin_func = 'smarty_' . $_type . '_' . $_name;
+            $_found = true;
+        }
+
+        /*
+         * Plugin specific processing and error checking.
+         */
+        if (!$_found) {
+            if ($_type == 'modifier') {
+                /*
+                 * In case modifier falls back on using PHP functions
+                 * directly, we only allow those specified in the security
+                 * context.
+                 */
+                if ($smarty->security && !in_array($_name, $smarty->security_settings['MODIFIER_FUNCS'])) {
+                    $_message = "(secure mode) modifier '$_name' is not allowed";
+                } else {
+                    if (!function_exists($_name)) {
+                        $_message = "modifier '$_name' is not implemented";
+                    } else {
+                        $_plugin_func = $_name;
+                        $_found = true;
+                    }
+                }
+            } else if ($_type == 'function') {
+                /*
+                 * This is a catch-all situation.
+                 */
+                $_message = "unknown tag - '$_name'";
+            }
+        }
+
+        if ($_found) {
+            $smarty->_plugins[$_type][$_name] = array($_plugin_func, $_tpl_file, $_tpl_line, true, true);
+        } else {
+            // output error
+            $smarty->_trigger_fatal_error('[plugin] ' . $_message, $_tpl_file, $_tpl_line, __FILE__, __LINE__);
+        }
+    }
+}
+
+/* vim: set expandtab: */
+
+?>